IB Biology SL D1.2.5 Translation Questions
In IB Biology SL D1.2.5, ribosomes decode mRNA to synthesize polypeptides. The order of codons in mRNA determines the amino acid sequence.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Explain how ribosomes decode mRNA codons to synthesize a polypeptide.
- Relate each mRNA codon to an amino acid to explain how codon order sets polypeptide sequence.
IB Biology SL D1.2.5 Translation Questions question 1
[Maximum number: 5]
People with the inherited disease hemophilia have a deficiency in one of the proteins that act as clotting factors in blood.
Outline how a protein is made in a cell by the process of translation.
| a | translation occurs on ribosomes when proteins/polypeptides are synthesized; |
| b | amino acid sequence of a protein is determined by the mRNA; |
| c | mRNA is determined by the order of bases of DNA/order of bases sequence in a gene; |
| d | codons (of 3 bases) on mRNA correspond to one amino acid in a polypeptide; |
| e | codons are on mRNA and anticodons on tRNA; |
| f | mRNA binds to ribosome/(during initiation) small ribosomal subunit binds to the start of the mRNA sequence; |
| g | tRNA transfers an amino acid to large ribosomal subunit/to the ribosome; |
| h | reference to start or stop codon; |
| i | tRNA moves to the next mRNA codon to continue the process, creating an amino acid chain; |
| j | peptide bond formed between amino acids |
| k | translation/order of amino acids depends on complementary base pairing between codons and anticodons; |
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